"ml" wrote in message
...
In article ,
Richard Clark wrote:

On Sun, 19 Jun 2005 18:11:20 GMT, ml wrote:
antenna 'rf' wise, i my antenna height measurement that i use, above
the ground or roof surface??

Hi Myles,

Both. For purposes of feeding it, the proximity of other conductors
and sources of loss, the antenna is as close as that 20' you offer.
On the other hand, for purposes of propagation, your antenna will act
like it is elevated 175'.

Your experience, compared to others, will fall somewhere in between.
Personally, I would think you have a very nice situation. If you seek
to improve it, it would only be in shades of a degree, not in leaps
nor bounds.

73's
Richard Clark, KB7QHC

dear Richard


thanks very much you set me straight.

I do ponder what i'd have to do (antenna wise) to get a significant
order of magnatude like perhas 200% ie 6db?

i guess going from dipole to a large beam would be significant in
comparasion

but what do you do when you want a bit more than a typical single beam
gives you? stack/co phase 2???

(naturally i am not counting amps of anykind here)

thanks all


and Rich , thanks

m

If you haven't already, you might want to check out what's happening at
Spiderbeam http://www.spiderbeam.net/ - - the construction techniques they
use appear to hold considerable promise. I'm particularly impressed with the
idea of incorporating a 40 meter dipole into their multiband Yagi array,
using a Delta-match fed wire connecting the 20m reflector and director
together so they act as capacitive hats to bring that short wire to
resonance at 7.05MHz. The details of the 40m modification are discussed in
the Spiderbeam Yahoo! group.

Chuck W6PKP